JPH0734342B2 - Contact for vacuum circuit breaker - Google Patents
Contact for vacuum circuit breakerInfo
- Publication number
- JPH0734342B2 JPH0734342B2 JP60002689A JP268985A JPH0734342B2 JP H0734342 B2 JPH0734342 B2 JP H0734342B2 JP 60002689 A JP60002689 A JP 60002689A JP 268985 A JP268985 A JP 268985A JP H0734342 B2 JPH0734342 B2 JP H0734342B2
- Authority
- JP
- Japan
- Prior art keywords
- volume
- copper
- contact material
- molybdenum
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は大電流しゃ断性能に優れ、かつ耐電圧性能に
優れた真空しや断器用接点材料に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a contact material for a vacuum breaker or a breaker, which is excellent in large-current breaking performance and excellent in withstand voltage performance.
〔従来の技術〕 真空しや断器は、その無保守，無公害性，優れたしゃ断
性能等の利点を持つため、適用範囲が急速に拡大してき
ている。また、それに伴い、より高耐圧化，大電流しゃ
断化の要求がきびしくなってきている。一方、真空しや
断器の性能は真空容器内の接点材料によって決定される
要素がきわめて大である。[Prior Art] Vacuum pumps and circuit breakers have advantages such as no maintenance, no pollution, and excellent breaking performance, so that the range of application is rapidly expanding. Along with this, demands for higher breakdown voltage and higher current interruption are becoming more severe. On the other hand, the performance of the vacuum breaker and the breaker is extremely dependent on the contact material in the vacuum container.
真空しや断器用接点材料の満足すべき特性として、
（１）しゃ断容量が大きいこと、（２）耐電圧が高いこ
と、（３）接触抵抗が小さいこと、（４）溶着力が小さ
いこと、（５）接点消耗量が小さいこと、（６）さい断
電流値が小さいこと、（７）加工性が良いこと、（８）
十分な機械的強度を有すること等がある。As satisfactory characteristics of vacuum and breaker contact materials,
(1) Large breaking capacity, (2) High withstand voltage, (3) Small contact resistance, (4) Small welding force, (5) Small contact consumption, (6) Small breaking current value, (7) Good workability, (8)
It may have sufficient mechanical strength.
実際の接点材料では、これらの特性を全て満足させるこ
とは、かなり困難であつて、一般には用途に応じて特に
重要な特性を満足させ、他の特性をある程度犠牲にした
材料を使用しているのが実状である。例えば特開昭55−
78429号に記載の銅−タングステン接点材料は耐電圧性
能が優れているため、負荷開閉器や接触器等の用途によ
く用いられているが、この接点材料は大電流しゃ断性能
が若干劣るという面を持つている。In the actual contact material, it is quite difficult to satisfy all of these characteristics, and in general, a material satisfying particularly important characteristics depending on the application and sacrificing other characteristics to some extent are used. Is the actual situation. For example, JP-A-55-
Since the copper-tungsten contact material described in No. 78429 has excellent withstand voltage performance, it is often used for applications such as load switches and contactors, but this contact material is slightly inferior in high current interruption performance. Have
一方、例えば特開昭54−71375号に記載の銅−クロム接
点材料は非常にしや断性能が優れているため、しや断器
等の用途によく用いられているが、耐電圧性能では上記
銅−タングステン接点材料に劣つている。On the other hand, for example, the copper-chromium contact material described in JP-A-54-71375 is very often used for applications such as a comb and a breaker because of its very excellent breaking performance. Inferior to copper-tungsten contact materials.
上記真空しや断器用接点材料の他に、一般に気中，油中
等で用いられている接点材料の例が「粉末治金学（日刊
工業新聞社刊）」等の文献に挙げられている。しかし、
例えば粉末治金学p.229〜230に記載の銀−モリブデン系
接点材料や銅−モリブデン接点材料は真空しや断器用接
点に用いた場合、耐電圧性能は上記銅−タングステン接
点材料よりも劣り、電流しや断性能は上記銅−クロム接
点材料よりも劣つているため、現在のところほとんど使
用されていない。In addition to the above vacuum and breaker contact materials, examples of contact materials generally used in air, oil, etc. are given in documents such as "Powder Metallurgy (Published by Nikkan Kogyo Shimbun)". But,
For example, in the case of powder metallurgy p.229-230, silver-molybdenum-based contact materials and copper-molybdenum contact materials have inferior withstand voltage performance when used as contacts for vacuuming and disconnection. However, since the current-carrying and breaking performance is inferior to that of the above-mentioned copper-chromium contact material, it is hardly used at present.
従来の真空しや断器用接点は以上のように、各々の特性
を活かして使用されてきたが、近年真空しや断器の大電
流化，高電圧化への要求が一段と厳しくなり、従来の接
点材料では要求性能を十分満足させることが困難になつ
てきている。又、真空しや断器の小型化に対しても、よ
り優れた性能をもつ接点材料が求められている。As described above, conventional vacuum contacts and breaker contacts have been used by taking advantage of their respective characteristics. In recent years, however, the demands for higher current and higher voltage for vacuum breakers and breakers have become even more stringent. It has become difficult to sufficiently satisfy the required performance with contact materials. Further, there is a demand for a contact material having superior performance with respect to vacuuming and downsizing of circuit breakers.
この発明は上記のような従来のものを改良するためにな
されたもので、しや断性能に優れた真空しや断器用接点
材料を提供することを目的としている。The present invention has been made in order to improve the above-mentioned conventional ones, and an object thereof is to provide a contact material for a vacuum breaker or a breaker, which is excellent in breaking and breaking performance.
発明者らは銅に種々の金属，合金，金属間化合物を添加
した材料を試作し、真空しや断器に組込み、種々の実験
を行つた。この結果、銅とクロムとモリブデンとタンタ
ルから成る接点材料は非常に優れたしや断性能を有して
いることが判つた。The inventors made a prototype of a material in which various metals, alloys, and intermetallic compounds were added to copper, incorporated it in a vacuum and a breaker, and conducted various experiments. As a result, it was found that the contact material composed of copper, chromium, molybdenum and tantalum has a very excellent breaking property.
この発明による真空しや断器用接点材料は銅とクロムと
モリブデンとタンタルから成ることを特徴としたもので
ある。The contact material for vacuum breakers and circuit breakers according to the present invention is characterized by being composed of copper, chromium, molybdenum and tantalum.
この発明における真空しや断器用接点材料は銅とクロム
とモリブデンとタンタルとから成るので、これら材料の
特性が作用し、しや断特性の向上、耐電圧特性が向上す
る。Since the vacuum contact and disconnecting contact material in the present invention is made of copper, chromium, molybdenum, and tantalum, the characteristics of these materials act to improve the contact resistance and withstand voltage characteristics.
以下、この発明の実施例について説明する。 Examples of the present invention will be described below.
（接点材料の作成） 接点材料の作成は粉末治金法を用い、溶浸法，完全粉末
焼結法及びホツトプレス法の３通りで行つた。(Production of Contact Material) The contact material was produced by the powder metallurgy method by the infiltration method, the complete powder sintering method and the hot press method.
第１の溶浸法による接点材料の製造方法は、粒径45μｍ
以下のクロム粉末と平均粒径３μｍのモリブデン粉末と
粒径40μｍ以下のタンタル粉末と粒径40μｍ以下の銅粉
末を各々34.32対43.28対17.73対4.67の割合で秤量した
後、２時間混合を行い、つづいてこの混合粉を所定の形
状の金型に充填し、1ton/cm2の荷重でプレスし成形を行
つた。The first method for producing contact materials by the infiltration method has a particle size of 45 μm.
The following chromium powder, molybdenum powder with an average particle size of 3 μm, tantalum powder with a particle size of 40 μm or less, and copper powder with a particle size of 40 μm or less were weighed in a ratio of 34.32: 43.28: 17.73: 4.67, and then mixed for 2 hours, Subsequently, this mixed powder was filled in a mold having a predetermined shape, and pressed under a load of 1 ton / cm 2 to perform molding.
次にこの成形体を真空中1000℃で２時間焼結し仮焼結体
を得た。この後、仮焼結体に無酸素銅の塊をのせて、水
素雰囲気中1250℃で１時間保持し、無酸素銅を仮焼結体
に含浸させ接点材料とした。この接点材料の最終成分比
を表１にサンプル12として示す。尚、表１には上記に示
したものと同一方法により製造した他の成分比の接点材
料についても合せて掲げてあり、サンプル１〜10までは
銅量60体積％を目標とし、サンプル11〜20までは銅量50
体積％を目標、サンプル21〜30までは銅量40体積％を目
標とした。Next, this compact was sintered in vacuum at 1000 ° C. for 2 hours to obtain a temporary sintered body. After that, a mass of oxygen-free copper was placed on the temporary sintered body and kept in a hydrogen atmosphere at 1250 ° C. for 1 hour to impregnate the temporary sintered body with oxygen-free copper to obtain a contact material. The final composition ratio of this contact material is shown as sample 12 in Table 1. In addition, Table 1 also shows contact materials having other component ratios manufactured by the same method as shown above. Samples 1 to 10 are targeted for a copper content of 60% by volume, and samples 11 to Copper amount up to 20 50
Volume% was targeted, and samples 21 to 30 were targeted for a copper content of 40% by volume.
第２の完全粉末焼結体による接点材料の製造方法は粒径
75μｍ以下のクロム粉末と平均粒径３μｍのモリブデン
粉末と粒径40μｍ以下のタンタル粉末と粒径40μｍ以下
の銅粉末を各々14.40対18.16対7.44対60.00の割合で秤
量した後２時間混合を行い、つづいてこの混合粉を所定
の形状の金型に充填し、3.3ton/cm2の荷重でプレスし成
形を行つた。The second method for manufacturing contact materials using the complete powder sintered body is the particle size.
Chromium powder less than 75 μm, molybdenum powder with an average particle size of 3 μm, tantalum powder with a particle size of 40 μm or less, and copper powder with a particle size of less than 40 μm were weighed in the ratios of 14.40: 18.16: 7.44: 60.00 and mixed for 2 hours, Subsequently, this mixed powder was filled in a mold having a predetermined shape, and pressed under a load of 3.3 ton / cm 2 to perform molding.
次にこの成形体を水素雰囲気中銅の融点直下で２時間焼
結を行い接点材料を得た。表２にサンプル32としてこの
例を示す。同様にして得られた他の成分比の材料につい
ても合せて表２に掲げる。表２のサンプル31〜40が銅量
60体積％で、サンプル41〜50が銅量75％体積％である。Next, this molded body was sintered in a hydrogen atmosphere immediately below the melting point of copper for 2 hours to obtain a contact material. Table 2 shows this example as sample 32. The materials having other component ratios obtained in the same manner are also listed in Table 2. Samples 31 to 40 in Table 2 are copper
At 60% by volume, samples 41-50 have a copper content of 75% by volume.
第３のホツトプレス法による接点材料の製造法は粉末の
混合までは先に述べた完全粉末焼結法と同じであり、先
の例と同一混合粉を使用した。この混合粉をカーボン製
のダイスに充填し、真空中で２時間加熱、この間に200k
g/cm2の荷重を加え接点材料の塊を得た。表３にサンプ
ル52としてこの例を示す。同様にして得られた他の成分
比の材料についても合せて表３に掲げる。表３のサンプ
ル51〜60が銅量60体積％でサンプル61〜70が銅量75体積
％である。The method of manufacturing the contact material by the third hot pressing method is the same as the above-described complete powder sintering method until the powders are mixed, and the same mixed powder as in the previous example was used. This mixed powder is filled in a carbon die and heated in a vacuum for 2 hours.
A load of g / cm 2 was applied to obtain a mass of contact material. Table 3 shows this example as sample 52. Table 3 also shows materials having other component ratios obtained in the same manner. Samples 51 to 60 in Table 3 have a copper content of 60% by volume, and samples 61 to 70 have a copper content of 75% by volume.
尚、本発明接点材料との比較をするための従来の接点材
料を表４に示してある。表４のサンプル71が溶浸法によ
り得られた比較例としての銅−モリブデン合金、サンプ
ル72が完全粉末焼結法により得られた銅−モリブデン合
金、サンプル78がホツトプレス法により得られた銅−モ
リブデン合金で、従来例としてサンプル74に完全粉末焼
結法により得られた銅−クロム合金を示す。Table 4 shows conventional contact materials for comparison with the contact material of the present invention. Sample 71 in Table 4 is a copper-molybdenum alloy as a comparative example obtained by the infiltration method, sample 72 is a copper-molybdenum alloy obtained by the complete powder sintering method, and sample 78 is a copper-molybdenum alloy obtained by the hot pressing method. As a molybdenum alloy, as a conventional example, Sample 74 shows a copper-chromium alloy obtained by the complete powder sintering method.
（接点材料の特性、実験） 前記各製法により製造された接点材料は直径20mmの電極
に機械加工された後、各々電気伝導度を測定した。測定
は金属導伝率測定器（フエルスター シグマテスト2.06
7）を用い、得られたデータは表1.2.3.4に合せて示して
いる。これより本発明接点材料は従来例である銅−クロ
ム接点材料と同等もしくはそれ以上であることが判る。 (Characteristics of Contact Material, Experiment) The contact material manufactured by each of the above-mentioned manufacturing methods was machined into an electrode having a diameter of 20 mm, and then the electrical conductivity was measured. The measurement is a metal conductivity meter (Fuelstar Sigma Test 2.06
7) was used and the data obtained are also shown in Table 1.2.3.4. From this, it can be seen that the contact material of the present invention is equivalent to or more than the conventional copper-chromium contact material.
次にこれらの電極を真空しや断器に組込み、電気特性を
測定した。第１図，第２図及び第３図はは表１に示され
た本発明接点材料のしや断性能を示したものであり、表
４のサンプル71（比較例）のしや断性能を１としたとき
の本発明による接点材料のしや断性能を表わしたもので
ある。図の横軸は本発明接点材料が４元系であるため、
銅を除いた成分を基準（100体積％）とし、この中でモ
リブデンの占める割合を体積％で表示している。また図
の縦軸は比較例である銅−50体積％モリブデン接点材料
（サンプル71）のしや断性能を１とした際のしや断性能
を示しており、タンタルの銅以外の成分に占める割合で
第１図，第２図，第３図としている。従つて第１図は銅
を除いた成分中タンタルが10体積％を占める本発明接点
材料に関するものであり、図中１が銅量が約60体積％を
占め残部40体積％を100とした時にタンタルがその10体
積％を占める本発明接点材料サンプル1.2.3のしや断性
能を示しており、図中２は銅量が約50体積％を占め残部
50体積％を100とした時にタンタルがその10体積％を占
める本発明接点材料サンプル11,12,13のしや断性能を示
し、図中３は銅量が約40体積％を占め残部60体積％を10
0とした時にタンタルがその10体積％を占める本発明接
点材料サンプル21,22,23のしや断性能を示している。
又、図中４は基準用としての銅−モリブデン接点材料サ
ンプル71のしや断性能を示すラインで、図中５は従来例
である銅−クロム接点材料サンプル74のしや断性能を示
すラインである。第２図も第１図と同様で、銅量が約6
0,50,40体積％の本発明接点材料に関し残部を100とした
時にタンタルが30体積％を占めるものについて示し、第
３図はタンタルが50体積％を占めるものについて示して
いる。Next, these electrodes were evacuated and installed in a breaker, and the electrical characteristics were measured. FIG. 1, FIG. 2 and FIG. 3 show the breaking performance of the contact material of the present invention shown in Table 1, and show the breaking performance of Sample 71 (Comparative Example) in Table 4. 2 shows the breaking and breaking performance of the contact material according to the present invention when it is 1. Since the contact material of the present invention is a quaternary system on the horizontal axis of the figure,
The component excluding copper is taken as the standard (100% by volume), and the proportion of molybdenum in this is expressed in% by volume. The vertical axis of the figure shows the breaking performance when the breaking performance of the comparative copper-50% by volume molybdenum contact material (Sample 71) is set to 1, and it accounts for the components other than copper of tantalum. The ratios are shown in FIGS. 1, 2, and 3. Therefore, FIG. 1 relates to the contact material of the present invention in which tantalum in the components excluding copper occupies 10% by volume, and in FIG. 1, 1 indicates the amount of copper is about 60% by volume and the remaining 40% by volume is 100%. FIG. 2 shows the breaking performance of the contact material sample 1.2.3 of the present invention in which tantalum occupies 10% by volume thereof, and in FIG.
When 50% by volume is assumed to be 100%, tantalum shows 10% by volume of the contact material sample 11,12,13 of the present invention, and shows the breaking performance, and in the figure 3, the copper amount accounts for about 40% by volume and the balance 60%. % 10
It shows the breaking performance of the contact material samples 21, 22, 23 of the present invention in which tantalum occupies 10% by volume when 0 is set.
Reference numeral 4 in the drawing is a line showing the breaking performance of the copper-molybdenum contact material sample 71 as a reference, and 5 in the drawing is a line showing the breaking performance of the conventional copper-chromium contact material sample 74. Is. Fig. 2 is the same as Fig. 1, and the amount of copper is about 6
Regarding 0, 50, 40% by volume of the contact material of the present invention, tantalum occupies 30% by volume when the balance is 100, and FIG. 3 shows tantalum occupies 50% by volume.
これら第1,2,3図より、本発明接点材料は比較用の銅−
モリブデン接点材料より優れたしや断性能を有している
ことが判り、従来よく用いられている銅−クロム接点材
料と比較しても、本発明接点材料はほぼ全域で優れたし
や断性能を有していることが判る。又、銅以外の成分を
100とした時にタンタルがその70体積％を占めるサンプ
ル10,20,30に関してはクロムとモリブデンの体積％が各
々15体積％のものしか実験していないため図示していな
いが、比較用の銅−モリブデン接点材料（サンプル71）
に比べ、銅が60体積％品（サンプル10）が5.2倍，銅が5
0体積％品（サンプル20）が4.2倍，銅が40体積％品（サ
ンプル30）が4.0倍のしや断性能を有していた。従つ
て、実用的なしや断性能を有する本発明接点材料の成分
範囲は、タンタルが４体積％から42体積％まで、モリブ
デンが２体積％から51体積％まで、クロムが２体積％か
ら51体積％までである。From these FIGS. 1, 2 and 3, the contact material of the present invention is
It was found that the contact material of the present invention has a better breaking performance than that of the molybdenum contact material, and the contact material of the present invention has excellent breaking performance in almost the entire area even compared with the conventionally used copper-chromium contact material. It is understood that it has. Also, components other than copper
Samples 10, 20 and 30 in which tantalum occupies 70% by volume when set to 100 are not shown because only those in which the volume% of chromium and molybdenum are 15% by volume respectively are not shown, but copper for comparison- Molybdenum contact material (Sample 71)
Compared with, copper 60% by volume (sample 10) is 5.2 times, copper 5
The 0% by volume product (Sample 20) had 4.2 times and the copper 40% by volume product (Sample 30) had 4.0 times, and the breaking performance. Therefore, the range of components of the contact material of the present invention having a practical breaking performance is 4% by volume to 42% by volume of tantalum, 2% by volume to 51% by volume of molybdenum, and 2% by volume to 51% by volume of chromium. Up to%.
次に完全粉末焼結法により得られた本発明接点材料のし
や断性能を第４図，第５図及び第６図に示す。図の横軸
は本発明接点材料が４元系であるため、銅を除いた成分
を基準（100体積％）とし、この中でモリブデンの占め
る割合を体積％で表示している。また図の縦軸は比較例
である完全粉末焼結法により得られた銅−25体積％モリ
ブデン接点材料（サンプル72）のしや断性能を１とした
際のしや断性能を示しており、タンタルの銅以外の成分
に占める割合で第４図，第５図，第６図としている。従
つて第４図は銅を除いた成分中タンタルが10体積％を占
める本発明接点材料に関するものであり、図中12が銅量
が約75体積％を占め残部25体積％を100とした時にタン
タルがその10体積％を占める本発明接点材料サンプル4
1,42,43のしや断性能を示し、図中13が銅量が約60体積
％を占め残部40体積％を100とした時にタンタルがその1
0体積％を占める本発明接点材料サンプル31,32,33のし
や断性能を示している。又、図中14は基準用としての銅
−モリブデン接点材料サンプル72のしや断性能を示すラ
インで、図中15は従来例である銅−クロム接点材料サン
プル74のしや断性能を示すラインである。第５図も第４
図と同様で銅量が約75,60体積％の本発明接点材料に関
し残部を100とした時にタンタルが30体積％を占めるも
のについて示し、第６図も同様にタンタルが50体積％を
占めるものについて示している。Next, the breaking performance of the contact material of the present invention obtained by the complete powder sintering method is shown in FIGS. Since the contact material of the present invention is a quaternary system, the abscissa of the figure is based on the component excluding copper (100% by volume), and the proportion occupied by molybdenum in this is represented by volume%. The vertical axis of the figure shows the breaking performance when the breaking performance of the copper-25% by volume molybdenum contact material (Sample 72) obtained by the complete powder sintering method which is a comparative example is set to 1. The ratio of tantalum to components other than copper is shown in FIGS. 4, 5, and 6. Therefore, FIG. 4 relates to the contact material of the present invention in which tantalum in the components excluding copper occupies 10% by volume, and when 12 in the figure occupies about 75% by volume of copper and the remaining 25% by volume is 100%. Inventive contact material sample 4 in which tantalum occupies 10% by volume
It shows the breaking performance of 1,42,43, and when 13 in the figure accounts for about 60% by volume of copper and the remaining 40% by volume is 100, tantalum is 1
It shows the breaking performance of the contact material samples 31, 32, 33 of the present invention which occupy 0% by volume. Further, 14 in the figure is a line showing the breaking performance of the copper-molybdenum contact material sample 72 as a reference, and 15 in the figure is a line showing the breaking performance of the conventional copper-chromium contact material sample 74. Is. Fig. 5 is also No. 4
Similar to the figure, tantalum occupies 30% by volume when the balance of the contact material of the present invention is about 75,60% by volume and the balance is 100, and FIG. 6 also shows that tantalum occupies 50% by volume. Is shown.
これら第４図，第５図，第６図より、本発明接点材料は
比較用の銅−モリブデン接点材料より優れたしや断性能
を有していることが判り、従来よく用いられている銅−
クロム接点材料と比較しても、本発明接点材料は優れた
しや断性能を有していることが判る。又、銅以外の成分
を100とした時にタンタルがその70体積％を占めるサン
プル40,50に関してはクロムとモリブデンの体積％が各
々15体積％のものしか実験していないため図示しないが
比較用の銅−モリブデン接点材料（サンプル72）に比
べ、銅が60体積％品（サンプル40）が4.1倍、銅が75体
積％品（サンプル50）が3.9倍のしや断性能を有してい
た。従つて実用的なしや断性能を有する本発明接点材料
の成分範囲は、タンタルが2.5体積％から28体積％ま
で、モリブデンが1.25体積％から34体積％まで、クロム
が1.25体積％から34体積％までである。From these FIGS. 4, 5, and 6, it is understood that the contact material of the present invention has a better breaking performance than the copper-molybdenum contact material for comparison, and copper which has been often used conventionally. −
It can be seen that the contact material of the present invention has excellent breaking performance as compared with the chromium contact material. For samples 40 and 50 in which tantalum occupies 70% by volume of the components other than copper as 100, only chromium and molybdenum of 15% by volume have been tested. Compared with the copper-molybdenum contact material (Sample 72), the copper 60% by volume product (Sample 40) had 4.1 times, and the copper 75% by volume product (Sample 50) had 3.9 times the breaking performance. Therefore, the composition range of the contact material of the present invention having a practical breaking performance is that tantalum is from 2.5% by volume to 28% by volume, molybdenum is from 1.25% by volume to 34% by volume, and chromium is from 1.25% by volume to 34% by volume. Up to.
次にホツトプレス法により得られた本発明接点材料のし
や断性能を第７図，第８図及び第９図に示す。図の横軸
は本発明接点材料が４元系であるため、銅を除いた成分
を基準（100体積％）とし、この中でモリブデンの占め
る割合を体積％で表示している。また図の縦軸は比較例
であるホツトプレス法により得られた銅−25体積％モリ
ブデン接点材料（サンプル73）のしや断性能を１とした
際のしや断性能を示しており、タンタルの銅以外の成分
に占める割合で第７図，第８図，第９図としている。従
つて第７図は銅を除いた成分中タンタルが10体積％を占
める本発明接点材料に関するものであり、図中20が銅量
が約75体積％を占め残部25体積％を100とした時にタン
タルがその10体積％を占める本発明接点材料サンプル6
1,62,63のしや断性能を示し、図中21が銅量が約60体積
％を占め残部40体積％を100とした時にタンタルがその1
0体積％を占める本発明接点材料サンプル51,52,53のし
や断性能を示している。又、図中22は基準用としての銅
−モリブデン接点材料サンプル78のしや断性能を示すラ
インで、図中23は従来例である銅−クロム接点材料サン
プル74のしや断性能を示すラインである。第８図も第７
図と同様で銅量が約75,60体積％の本発明接点材料に関
し残部を100とした時にタンタルが30体積％を占めるも
のについて示し、第９図も同様にタンタルが50体積％を
占めるものについて示している。Next, FIG. 7, FIG. 8 and FIG. 9 show the breaking and breaking performance of the contact material of the present invention obtained by the hot press method. Since the contact material of the present invention is a quaternary system, the abscissa of the figure is based on the component excluding copper (100% by volume), and the proportion occupied by molybdenum in this is represented by volume%. The vertical axis of the figure shows the breaking performance when the breaking performance of the copper-25 vol% molybdenum contact material (Sample 73) obtained by the hot press method as a comparative example is set to 1, and the tantalum Figures 7, 8 and 9 show the proportions of the components other than copper. Therefore, FIG. 7 relates to the contact material of the present invention in which tantalum in the components excluding copper occupies 10% by volume, and in the figure, when 20 represents copper in an amount of about 75% by volume and the remaining 25% by volume is 100. Inventive contact material sample 6 in which tantalum occupies 10% by volume
It shows the breaking performance of 1,62,63, and tantalum is part 1 when 21 in the figure occupies about 60% by volume of copper and the remaining 40% by volume is 100.
It shows the breaking performance of the contact material samples 51, 52, 53 of the present invention which occupy 0% by volume. In addition, 22 in the figure is a line showing the breaking performance of the copper-molybdenum contact material sample 78 as a reference, and 23 in the figure is a line showing the breaking performance of the conventional copper-chromium contact material sample 74. Is. Fig. 8 is also 7
Similar to the figure, tantalum occupies 30% by volume when the balance is set to 100 for the contact material of the present invention having a copper content of about 75,60% by volume, and FIG. 9 also shows that tantalum occupies 50% by volume. Is shown.
これら第７図，第８図，第９図より、本発明接点材料は
比較用の銅−モリブデン接点材料より優れたしや断性能
を有していることが判り、従来よく用いられている銅−
クロム接点材料と比較しても、本発明接点材料は優れた
しや断性能を有していることが判る。又、銅以外の成分
を100とした時にタンタルがその70体積％を占めるサン
プル60,70に関してはクロムとモリブデンの体積％が各
々15体積％のものしか実験していないため図示しないが
比較用の銅−モリブデン接点材料（サンプル73）に比
べ、銅が60体積％品（サンプル60）が4.2倍、銅が75体
積％品（サンプル70）が4.8倍のしや断性能を有してい
た。従つて実用的なしや断性能を有する本発明接点材料
の成分範囲は、タンタルが2.5体積％から28体積％ま
で、モリブデンが1.25体積％から34体積％まで、クロム
が1.25体積％から34体積％までである。From these FIGS. 7, 8 and 9, it is understood that the contact material of the present invention has a better breaking performance than the copper-molybdenum contact material for comparison, and copper which has been often used conventionally. −
It can be seen that the contact material of the present invention has excellent breaking performance as compared with the chromium contact material. For samples 60 and 70 in which tantalum occupies 70% by volume when the components other than copper are set to 100, only chromium and molybdenum of 15% by volume were tested, but not shown for comparison. Compared with the copper-molybdenum contact material (Sample 73), the copper 60 vol% product (Sample 60) had 4.2 times the breaking capacity and the 75 vol% copper product (Sample 70) had the breaking performance of 4.8 times. Therefore, the composition range of the contact material of the present invention having a practical breaking performance is that tantalum is from 2.5% by volume to 28% by volume, molybdenum is from 1.25% by volume to 34% by volume, and chromium is from 1.25% by volume to 34% by volume. Up to.
また、第１図の図中1,第４図の図中13,第７図の図中21
から銅量が60体積％で残部40体積％を100とした時にタ
ンタルが10体積％を占める本発明接点材料の製造方法の
違いによる比較が出来、製造方法にあまり依存しないこ
とが判る。又、第2.5.8図、及び第3.6.9図からも同様に
銅量が60体積％での製造方法法比較が出来、溶浸法が他
の２つより若干良いことが判る。しかし完全粉末焼結法
及びホツトプレス法で得られた本発明接点材料のしや断
性能も従来例の銅−クロム接点材料より優れており、製
法の違いによらず使用することが出来る。従つて本発明
接点材料は溶浸法，完全粉末焼結法，ホツトプレス法と
いつた製造方法にようず、タンタルが2.5体積％から42
体積％まで、モリブデンが1.25体積％から51体積％ま
で、クロムが1.25体積％から51体積％までの範囲で有効
である。1 in FIG. 1, FIG. 4 in FIG. 13, 13 in FIG.
From the above, it can be seen that tantalum occupies 10% by volume when the amount of copper is 60% by volume and the remaining 40% by volume is 100, and comparison is possible due to the difference in the manufacturing method of the contact material of the present invention, and it does not depend much on the manufacturing method. Also, from FIG. 2.5.8 and FIG. 3.6.9, similarly, it is possible to compare the manufacturing methods when the amount of copper is 60% by volume, and it is clear that the infiltration method is slightly better than the other two. However, the contact and breaking properties of the contact material of the present invention obtained by the complete powder sintering method and the hot pressing method are superior to those of the conventional copper-chromium contact material, and can be used regardless of the manufacturing method. Therefore, the contact material of the present invention is similar to the infiltration method, the complete powder sintering method, the hot press method, and the like.
It is effective in the range of 1.25 volume% to 51 volume% for molybdenum and 1.25 volume% to 51 volume% for chromium.
また、モリブデンとクロムに着目するとモリブデンが多
い方が性能がよい傾向がある、この理由は良く判らない
が、考えられる原因の１つとしては、銅にクロムが固溶
し電気伝導度が下がることが考えられる。この傾向は溶
浸法で著しく表われており、実使用に際してはモリブデ
ン量が多い方が望しい。Also, when we focus on molybdenum and chromium, the performance tends to be better when there is more molybdenum. The reason for this is not clear, but one possible cause is that chromium is a solid solution in copper and the electrical conductivity is reduced. Can be considered. This tendency is remarkably exhibited by the infiltration method, and it is desirable that the molybdenum content be large in actual use.
一方、他の電気特性として耐電圧性能を測定した。測定
はコンデイシヨニング法を用い、接点間隔を一定にした
状態で交流電圧を徐々に印加して行く方法で、判定は一
定の時間、無放電である電圧が何ボルトであるかで、従
来例である銅−クロム接点材料と比較した。その結果、
本発明接点材料の耐電圧性能は従来例である銅−クロム
接点材料の約1.2〜1.5倍の範囲にあつた。又、電流を開
閉する実験中、接点が開離している間に高電圧を印加し
て放電の有無をチエツクするというくり返しテストでの
放電の確率を計算した所、本発明接点材料は従来の銅−
クロム接点材料に比べ、放電する確率が1/3〜1/5であ
り、この実験からも耐電圧性能に優れていることが判つ
た。On the other hand, withstand voltage performance was measured as another electrical characteristic. The measurement is performed by using the conditioning method, and the AC voltage is gradually applied with the contact spacing kept constant. Judgment is based on what voltage is the voltage without discharge for a certain period of time. Compared to the example copper-chromium contact material. as a result,
The withstand voltage performance of the contact material of the present invention was about 1.2 to 1.5 times that of the conventional copper-chromium contact material. Further, during the experiment of opening and closing the current, the probability of discharge in the repeated test of checking the presence or absence of discharge by applying a high voltage while the contact was open was calculated. −
Compared with the chrome contact material, the probability of discharging is 1/3 to 1/5, and it was found from this experiment that it has excellent withstand voltage performance.
以上のように、この発明によれば、真空しや断器の電極
に銅とクロムとモリブデンとタンタルから成る接点材料
を用いたので、しや断性能と耐電圧性能が向上するとい
う効果が得られる。As described above, according to the present invention, since the contact material made of copper, chromium, molybdenum, and tantalum is used for the electrodes of the vacuum breaker and the circuit breaker, the effect of improving the breaking performance and the withstand voltage performance can be obtained. To be
第１図，第２図及び第３図はこの発明の一実施例である
溶浸法により製造された銅−クロム−モリブデン−タン
タル接点材料のしや断性能を示すグラフ、第４図，第５
図及び第６図はこの発明の一実施例である完全粉末焼結
法により製造された銅−クロム−モリブデン−タンタル
接点材料のしや断性能を示すグラフ、第７図，第８図及
び第９図はこの発明の一実施例であるホツトプレス法に
より製造された銅−クロム−モリブデン−タンタル接点
材料のしや断性能を示すグラフである。FIGS. 1, 2 and 3 are graphs showing the breaking performance of a copper-chromium-molybdenum-tantalum contact material manufactured by the infiltration method which is an embodiment of the present invention, FIG. 4, FIG. 5
6 and 6 are graphs showing the breaking performance of a copper-chromium-molybdenum-tantalum contact material manufactured by the complete powder sintering method which is an embodiment of the present invention, FIGS. 7, 8 and FIG. 9 is a graph showing the breaking performance of a copper-chromium-molybdenum-tantalum contact material manufactured by the hot press method which is an embodiment of the present invention.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−119626（ＪＰ，Ａ) 特開 昭59−81816（ＪＰ，Ａ) 特開 昭59−42734（ＪＰ，Ａ) 特開 昭59−58724（ＪＰ，Ａ) 特開 昭55−78429（ＪＰ，Ａ) 特開 昭59−201331（ＪＰ，Ａ) 特開 昭59−215621（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-119626 (JP, A) JP-A-59-81816 (JP, A) JP-A-59-42734 (JP, A) JP-A-59- 58724 (JP, A) JP-A-55-78429 (JP, A) JP-A-59-201331 (JP, A) JP-A-59-215621 (JP, A)
Claims (2)
対の電極を有する真空しや断器において、その電極材料
が銅とクロムとモリブデンとタンタルから成ることを特
徴とする真空しや断器用接点。1. A vacuum breaker or breaker having a pair of electrodes facing each other in a vacuum container, the electrodes being made of copper, chromium, molybdenum, and tantalum. Dexterous contact.
各々単体金属，四者，三者もしくは二者の合金，四者，
三者もしくは二者の金属間化合物，又はそれらの複合体
として分布していることを特徴とする特許請求の範囲第
１項に記載の真空しや断器用接点。2. Copper, chromium, molybdenum and tantalum,
Single metal, four-way, three-way or two-way alloy, four-way,
The contact for vacuum breaker or disconnector according to claim 1, wherein the contact is distributed as a three-way or two-way intermetallic compound or a composite thereof.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60002689A JPH0734342B2 (en) | 1985-01-10 | 1985-01-10 | Contact for vacuum circuit breaker |
| CN85108080.4A CN1003329B (en) | 1984-12-13 | 1985-11-04 | Contact for vacuum circuit breaker |
| KR1019850008360A KR890002585B1 (en) | 1984-12-13 | 1985-11-08 | Vacuum circuit breaker contact |
| DE8585115919T DE3584825D1 (en) | 1984-12-13 | 1985-12-13 | CONTACT FOR VACUUM SWITCHES. |
| EP85115919A EP0184854B1 (en) | 1984-12-13 | 1985-12-13 | Contact for vacuum interrupter |
| US07/080,260 US4870231A (en) | 1984-12-13 | 1987-07-27 | Contact for vacuum interrupter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60002689A JPH0734342B2 (en) | 1985-01-10 | 1985-01-10 | Contact for vacuum circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61161629A JPS61161629A (en) | 1986-07-22 |
| JPH0734342B2 true JPH0734342B2 (en) | 1995-04-12 |
Family
ID=11536248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60002689A Expired - Fee Related JPH0734342B2 (en) | 1984-12-13 | 1985-01-10 | Contact for vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0734342B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009115505A (en) * | 2007-11-02 | 2009-05-28 | Mitsubishi Electric Corp | Winding inspection apparatus and inspection method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5942734A (en) * | 1982-09-01 | 1984-03-09 | 株式会社日立製作所 | Electrical contacts and their manufacturing method |
| JPS5958724A (en) * | 1982-09-28 | 1984-04-04 | 株式会社東芝 | Contact for vacuum bulb and method of producing same |
-
1985
- 1985-01-10 JP JP60002689A patent/JPH0734342B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61161629A (en) | 1986-07-22 |
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